Create a Factory for NativeMetafile.

printing/pdf_ps_metafile_cairo_unittest.cc

Index: printing/pdf_ps_metafile_cairo_unittest.cc
diff --git a/printing/pdf_ps_metafile_cairo_unittest.cc b/printing/pdf_ps_metafile_cairo_unittest.cc
index b7ed449cfa7838d810e97cbe1b71a0908ed1e090..a3442c843efbb3b9db7029a95991ed4935746e1e 100644
--- a/printing/pdf_ps_metafile_cairo_unittest.cc
+++ b/printing/pdf_ps_metafile_cairo_unittest.cc
@@ -15,6 +15,8 @@
 
 typedef struct _cairo cairo_t;
 
+namespace {
+
 class PdfPsTest : public testing::Test {
  protected:
   base::FileDescriptor DevNullFD() {
@@ -22,6 +24,10 @@ class PdfPsTest : public testing::Test {
   }
 };
 
+}  // namespace
+
+namespace printing {
+
 TEST_F(PdfPsTest, Pdf) {
   // Tests in-renderer constructor.
   printing::PdfPsMetafile pdf;
@@ -81,3 +87,5 @@ TEST_F(PdfPsTest, Pdf) {
   pdf3.GetData(WriteInto(&output, size + 1), size);
   EXPECT_EQ(test_raw_data, output);
 }
+
+}  // namespace printing